Here's the back yard way of doing one.... Go to Lowes or Home depot and buy 2 Shepard's hooks, 2 one foot chain lengths, 2 D rings (or equivalent) and a drill bit that cuts a large enough hole for the D ring to fit thru. Put the shepard's hooks up so that each 1 foot chain hangs from each hook, and then hook the chain to the D rings and then the gong. It should have the gong hanging pretty much centered between the two hooks. This will allow it to swing, but not twist (from the wind or from hits). If you are using a big heavy gong, you may have to reinforce the hooks with a fencing stake or rod, but it works and it not too hard to transport of move.